| Summary: | 碩士 === 國立成功大學 === 系統及船舶機電工程學系碩博士班 === 100 === This thesis combines a single DI diesel engine with CO2 absorption system and installs the hydrogen injected automatically system, anti-explosion-burning system to form a closed cycle diesel engine. Operating parameters of the oxygen concentration are fixed at 23%, ECU injection at 10ATDC, KOH weight percentage concentration of 10%, 15%, and 20% (CO2 absorbent), and hydrogen pre-mixing ratio of 0%, 5%, 10%, and 20%. Engine exhaust pollution, gas content which before and after CO2 absorption system, cylinder pressure are measured to investigate the combustion characteristics of hydrogen and the concentration of KOH for the CCDE system.
The numerical simulation by KIVA3V is used as the main of the program modifying some sub-models with additional detailed chemical reaction, and the results between the simulation and the experiment will be identified. Then the temperature fields within the cylinder and pollutant generation are realized.
The simulation and experimental results show that a diesel engine is better with premixed hydrogen than without premixed hydrogen in decreasing exhaust emissions, and the result is conspicuous for the reduction of carbon-monoxide, carbon-dioxide and soot emission, so as to increase the life of CCDE system. However, a higher peak pressure and temperature will lead to NOX generation.
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